摘要
【目的】了解不同种植年限茶树根际土壤微生物数量和肥力指标之间的相关性,为茶园土壤改良和稳定生产提供依据。【方法】采用稀释平板法对武夷山茗上缘茶业有限公司试验茶园不同土层不同种植年限(5、10、15年)茶树根际土壤微生物数量进行研究,并与土壤肥力指标进行相关性分析。【结果】可培养微生物数量随着土层加深而减少;10年生茶树根际土壤可培养细菌数量最大,不同种植年限茶树根际土壤的可培养真菌数量在不同土层表现出不一样的变化趋势。茶树根际土壤酸化严重,pH值为3.14~3.36;随着种植年限的增加,各项肥力指标的变化趋势不尽相同,0~15 cm土层的全磷和全钾含量随着种植年限的增加而降低,15~30 cm土层全氮和碱解氮的含量随着种植年限的增加而增加,其他的指标则在连续种植5年或10年的时候出现最高值或最低值。冗余分析发现,可培养细菌数量主要受速效钾和全磷含量的影响,可培养真菌数量主要受全氮和碱解氮含量的影响。【结论】采样点不同种植年限茶树根际土壤微生物数量和部分肥力指标之间存在着相关性。
【Objective】Correlation between the microbial community and the nutrients in rhizosphere soils of varied years of tea-planting was studied to improve soil conditions and productivity at tea plantations.【Method】Microbial specimens collected from the rhizosphere soils at areas where tea bushes had been planted for 5,10 and 15 years in Wuyishan city were cultured in the lab using standard dilution-plating method.A correlation analysis was conducted between the microbial count and soil fertility at corresponding sampling spots.【Result】The microbial population in soil layers decreased with the depth.The counts in different soil layers at areas of different planting ages did not show a consistent pattern.The 10-year-old planting area had the highest microbial count in the rhizosphere.Acidification of the rhizosphere soils was serious showing a pH ranging from 3.14 to 3.36.The fertility indices on soils of different planting ages differed.The contents of total P and total K in the 0−15 cm soil decreased with planting age,while those of total and available N in the 15−30 cm layer increased with years of planting.Other fertility indices either peaked or bottomed out when consecutively cultivated for 5 or 10-years.The redundancy analysis on the data revealed that the bacterial plate count was mainly affected by the contents of available K and total P in soil,while the fungal count by total and available N.【Conclusion】There was a significant correlation between the microbial population and fertility indices(e.g.,available K,available P,total N,and available N)in the rhizosphere soils of varying years of tea cultivation at the plantations.
作者
陈丽华
刘兰英
吕新
李玥仁
CHEN Li-hua;LIU Lan-ying;LÜXin;LI Yue-ren(Institute of Agricultural Quality Standards and Testing Technology Research,Fujian Academy of Agricultural Sciences/Fujian Key Laboratory of Agro-products Quality&Safety,Fuzhou,Fujian 350003,China)
出处
《福建农业学报》
CAS
CSCD
北大核心
2019年第12期1433-1439,共7页
Fujian Journal of Agricultural Sciences
基金
福建省自然科学基金项目（2017J01052）
福建省农业科学院一般项目（A2018-16）
关键词
茶树
根际土壤
微生物数量
肥力
种植年限
Tea plant
rhizosphere soil
microbial count
fertility
years of tea-planting
